Planoohaph co



7 L. ONDERDONK. incur EDGING MACHINE;

APPLICATION FILED MAY 24. 1916.

EETSSH I.

Patented Jul 1 .1919.

L. ONDERDONK.

PICOT EDGING MACHINE.

APPLICATION FILED MAY 24- WW.

1,308,608. Patented July 1, 1919;

5 SHEETS-SHEET 2.

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L. ONDERDONKf PICOT EDGINQ MACHINE. APPLICATION FILED MAY24.1916.

1,308,608. Patented July 1, 1919.

5 SHEETS-SHEET 3.

- rm: COLUMBIA PLANOGRAPH $0.. WASHINGTON, D. C.

L. ONDERDONK.

PICOT EDGING MACHINE.

APPLICATION FILED MAY 24. ms.

Patented July 1, 1919.

5 SHEETS-SHEET 4.

2 ifm' THB COLUMBIA PLANOGRAPII C0" WASHINGTON, D. C.

L. ONDERDONK.

PICOT EDGING MACHINE.

APPLICATION FILED MAY 24. 1916.

1,308,608. Patented July 1, 1919.

5 SHEETS-SHEET 5.

rm! COLUMBIA PLANOURAPH Cm, WASHINGTON. n. c.

UNITED, STATES PATENT OFFICE.

LANSING ONIDERDONK, on NEW YORK, N. Y., AssIGNoI To UNIoN SPECIALMACHINE COMPANY, or CHICAGO, ILLINOIS, A CORPORATION or ILLINOIS.

PICOT-EDGING MACHINE.

Specification of Letters Patent.

Patented July 1, 1919.

Application filed May 24, 1916. Serial No. 99,621.

ing for a fabric.

An object of the invention is to provide means cooperating with thestitch forming mechanism for forming at pie-determined intervals picotloops.

A further object of the invention is to provide a machine of the abovecharacter wherein the means for forming the picot loops hold the loopuntil the stitches are set, thus insuring that each loop shall be of a'pre-determined size.

These and other objects will in part be obvious and will in part behereinafter more fully disclosed.

In the drawings, which show by way of illustration one embodiment'of theinvention:

Figure 1 is a view, partly in front elevation and partly in section,showing a portion of a. sewing machine having my improvements appliedthereto;

Fig. 2 is a transverse sectional view, through the parts beneath thework support; also showing the needle and the needle bar, the sectionbeing taken at one side of the feed bar;

Fig. 3 is a transverse sectional view, through the parts beneath thework support; also showing the needle and. the neeclle bar, the viewshowing the mechanism for forming the picot loops in side elevation;

Fig. 4 is a View similar to Fig. 3,but showing the parts in a diiferentposition;

Fig. 5 is a plan View of the parts beneath the work support, and alsoshowing the needle in section;

Fig. i 6 is a view showing more or less diagrammatically the needle, thelooper, the

spreader and the picot loop-forming device at the time when said loopforming device 1s entering the needle loop; I

Fig. 7 is a view, similar to Fig. 6, but showing the stitches set andthe picot loop drawn down against the holding device therefor Fig. 8 isa bottom plan view of the fabric;

9 is a view, similar to Fig. 6, but showing a slightly modified form ofthe invention, wherein the picot loops are formed from the looper threadbetween stitches; and

Fig.10 is a view, similar to Fig. 9, but showing a further modified formof the invention wherein the picot loops are formed from a looper threadcarried by the under looper.

In carrying out my invention, I have provided a sewing machine havingstitch-forming mechanism for forming from the stitching threads anedging for a fabric and with a device which intermittently engages oneof the stitching threads for holding the same in extended loops, thusforming picot loops. As shown in the drawings, the

stitch forming mechanism and the picot loop forming device engages theneedle loop and holds the same extended' Said picot loop-forming deviceis timed to operate at every third stitch. Referring more in detail tothe drawmgs:

I have shown my invention as applied to a sewing machine havmg asupporting bed 1 which carries a standard 2 formed with an overhangingarm 3. Reciprocating in the overhanging arm is a needle bar 4 carrying aneedle 5. The needle bar is reciprocated by a needle lever 6 whichisconnected by a link 7 to the needle bar. Said needle lever is pivotedat 8 to the standard 2 and is oscillated by an eccentric strap 9 whichcooperates with an eccentric on the main shaft 10. Cooperating with theneedle beneath the work support is a spreader 11 which is mounted in aspreader carrier 12 pivoted at 13' to a supporting bracket 14. Saidspreader carrier '12 is oscillated by a link 15 which is connected to arock lever 16 pivoted at 17 to the standard 2. Said rock lever 16 isconnected by a link 18 with a needle lever extension 19. Also cooperat-24. This link 24 is also connected to a crank 25 on the main shaft 10.

The material is fed tothe stitching mechanism by a feed dog 26 which iscarried by- The above parts are of the usual construe.

tion in the well-known Union Special overseamingmachineand will not needfurther description. It will be understood that the needle passesthrough the fabric adjacent the edge, the Spreader 11 moves forward andengages theneedle loop and carries it to the edge of the fabric, whilethe threaded looper 20 moves through the needle loop to a position abovethe material where the thread loop of said looper is positioned for theentrance of the needle.

Cooperating with the stitch formingmechanism above described is aloopholding mechanism which consists of a loop-holding hook 30. Thisloop-holding hook 30-is adjustably mounted in a supporting head 31-carried by a bar 32 (see Figs. 2,3 and-4). Said hook is clamped to thehead 31 by a set-screw 33. The bar 32 is mounted so as to reciprocatefreely in a sleeve 34 which is pivoted at 35 to the housing or bracket36 (see Fig. 5). The sleeve 34 has a rearwardly projecting arm 37 whichis pivoted at 38 to an eccentric strap 39. The eccentric strap 39cooperates with an eccentric 40 attached to a gear wheel 41. The gearwheel 41 is mounted to rotate freely on a suppo-rting bearing 42 whichis secured to the housmg or bracket 36. Said gear wheel 41 is rotated bya gear wheel 43 mounted on the main shaft 1.0. At the upper end of theec-' centric strap. 39 there is a pin 44 whichis secured to theeccentric strap-so-that it may be adjusted longitudinally thereof. Saidpin has a shoulder which is clamped against the eccentric strap by aholding nut 45 and the eccentric strap is slotted so as to permit thispin 44 to be adjusted toward and from the eccentric40. The rod 32 isprovided with a cross head 46 which engages the pin 44.

As the main shaft rotates, the eccentric 40 will be rotated, and thiswill oscillate the eccentric strap. about the pivotal connection 38between the arm 37 and the eccentric strap. As the eccentricstraposcillates, the

pin 44 will be moved back and forth, that is,

to the right and to the left of the position shown in Fig. 4, and thiswill move the rod 32 endwise in the sleeve 34. The eccentric 40 will notonly oscillate the eccentric strap 39, but will move the same endwise assaid eccentric oscillates from the position shown in Figs. 2 and 3 tothe position shown in Fig. 4. This endwise movement of the eccentricstrap oscillates the sleeve 34 about In Fig. 6 of the drawings, I haveshown diagrammatically a fabric, indicated at F, in which a series ofstitches have been formed consisting of a needle thread it which isconcatenated with a looper thread Z. The needle passes down through thefabric and the spreader 11 engages the needle loop and carries the sameoutward beyond the edge of the fabric to a position so that the looper20 may pass through the needle loop, carrying the looper thread in loo-pform from the-edge of the fabric into a position for the needle 5 toenter. In Fig. 6, the spreader is at the extreme end of its movement andis holding the needle loop which is indicated at a; The spreader is'atthe extreme forward end of its stroke and the looper is about to enterinto the loop formed by the looper which is indicated at Z. The picotloopforming hook .30 is so timed that, when at the forward end of itsstroke and on its downward movement, it will enter the needle loop n.The gear wheel 41 is larger than the gear wheel 43 so that, as shown inthe drawings, the gear wheel 41 moves one complete rotation to everythree complete rotations ofthe main shaft 10. Therefore,

i at every third reciprocation; of the needle,

threads, and set the stitch, after which the hook will move upward andrelease the picot loop.

When the parts are timed as shown in the drawings, a picot loop, thatis, a loop lying in the plane of thefabric and projecting beyond theedge of the fabric and the other loops of the overseaming stitching,will be formed at every third stitc'h or reciprocation of theneedle. Itwill be apparent that the gear .Wl1e8ls 41 and 43 may be readily removed, and gear wheels of different sizes substituted therefor, so as tochange the timing of the picot loop-forming hook and picot loops may beformed at every second stitch,

or every fourth stitch or any desired number of stitches.

In Fig. 9 of the drawings, I have shown diagrammatically a stitchforming mechanism of the character above described, but in this instancethe holding hook 30 is timed and positionedso as to engage the looperthread between stitches instead of engaging,

I tneneedle thread loop. In this form of the invention, the picot loopis formed from the looper thread and maybe formed at any deing hook inthis instance is timed and positioned so.as to engage the looper threadformed by the under looper 4:7 and the picot loop is formed in thethread 8.

The eccentric 40 is adjustably connected to the gear wheel 41 so thatthe throw of the eccentric may be slightly varied for changing thetiming of the picot loop-forming hook 30. Also by adjusting the pin 44,the back and forth movement of the hook may be further varied. Throughthe set-screw 33 the position of the hook on the supporting head may bevaried. These adjustments assist in operatively positioning the hook soas to bring about the cooperative action and timing above referred to.It is understood that in order to change the time of making the picotloop from one stitch to another would, however, require the changing ofthe gears.

It will also be noted that the timing of the small gear 43 on the shaft10 either forward or backward can be readily accomplished, and thischange in the timing of the gear will result in changing the timing ofthe hook forming the loop so as to properly cause the hook to engage thethreads for making the picot loops.

It is obvious that minor changes in the details of construction and thearrangements of parts may be made without departing from the spirit ofthe invention, as set forth in the appended claims.

Having thus described the invention, what is claimed as new is r 1. Asewing machine including in combination a work support, a needle, alooper cooperating with the needle beneath the work support, a secondlooper cooperating with the first named looper and with the needle abovethe work support, whereby over edge stitches are formed and meanscooperating with the stitch forming mechanism for forming from one ofthe stitching threads picot loops.

2. A sewing machine including in combination a work support, a needle, alooper cooperating with the needle beneath the work support, a secondlooper cooperating with the first named looper and with the needle abovethe work upport, whereby over edge stitches are formed, a loop holdinghook and means for operating the same to engage one This threaded of thestitching threads and forming a loop therein which projects beyond theedge of the fabric.

3. A sewing machine including in combination a work support, a needle, alooper cooperating with the needle beneath the worksupport, a secondlooper cooperating with the first named looper and with the needle abovethe work support, whereby over edge stitches are formed, a loop holdinghook and means for operating said holding hook to cause the same toengage and form a loop in one of the stitching threads at predeterminedintervals of two or more stitches.

4. A sewing machine including in combination, over-edge stitch formingmechanism including a needle, complemental stitch forming devices, aloop-holding hook, and means for operating said loop-holding hook forengaging the needle thread loop and holding the same extended atpredetermined intervals to form picot loops.

5. A sewing machine including in combination, over-edge stitch formingmechanism including a needle and complemental stitch forming devices, aholding hook, and means for operating said holding hook to engage theneedle loop and hold the same extended beyond the edge of the fabric atpredetermined intervals of two or more stitches to form picot loops.

6. A sewing machine including in combination, over-edge stitch formingmechanism, a loop holding hook cooperating therewith to form picotloops, a supporting bar for said hook, means for oscillating said barand for moving the same endwise for causing the hook to engage one ofthe stitching threads at predetermined intervals.

7. A sewing machine including in combination, over-edge stitch formingmechanism, a hook cooperating therewith to form picot loops, a barsupporting said hook, a sleeve within which said bar reciprocates, andmeans for oscillating said sleeve.

8. A sewing machine including in combination, over-edge, stitch formingmechanism, a hook cooperating therewith to form picot loops, a barsupporting said hook, a sleeve within which said bar reciprocates, aneccentric, an eccentric strap connected to said sleeve and to said barto oscillate said sleeve and for reciprocating the bar in said sleeve.

9. A sewing machine including in combination, over-edge stitch formingmechanism, a hook cooperating therewith to form picot loops, a barsupporting said hook, a sleeve within which said bar reciprocates, aneccentric, an eccentric strap, a pin carried by said eccentric strap, aslotted cross head carried by the bar and engaging said pin, an armcarried by the sleeve and pivoted to said eccentric strap between theeccentric and the pin.

10. A sewing machine including in combination, a main shaft, a needle,means for retrici oncefor every three rotations of the 10 ciprocatingthe needle, means cooperating main shaft.

with the needle to form over-edge stitches, In testimony whereof I aflixmy'signatu-re a holding hook, a supporting bar for said in thepresenceof two Witnesses.

holdin hook an eccentric an eccentric stra operat d the reby, meansoperated by th l LANSING ONDERDONK" eccentric strap for oscillating thebar and Witnesses:

moving the bar endWise, and means operated JOHN H. HOWELL,

from the main shaft for rotating the eccen- MATTHEW P. RYAN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

